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Top Forums Shell Programming and Scripting Very Simple "Tabs to Newline" Code??? Post 302455586 by gc_sw on Wednesday 22nd of September 2010 03:25:51 AM
Old 09-22-2010
Data Very Simple "Tabs to Newline" Code???

hi people;

i have a text, iptables.txt and values are as follows inside: (seperators are TAB)

Code:
10.15.2.2  2  40  10.15.3.3  1  10  10.32.2.1  3  40  10.33.6.7  2  50
10.16.3.2  1  60  10.11.3.9  1  20  10.19.2.1  1  80
10.16.9.9  3  20
10.29.7.9  2  90  10.33.2.7  3  40
......

i want to write these values as follows:

Code:
10.15.2.2  2  40
10.15.3.3  1  10
10.32.2.1  3  40
10.33.6.7  2  50
10.16.3.2  1  60
10.11.3.9  1  20
10.19.2.1  1  80
10.16.9.9  3  20
10.29.7.9  2  90
10.33.2.7  3  40
......

after each 3rd value, it must pass to newline. but some lines are 6, some of 9, some are 12 values in iptables.txt Smilie i want to say: "go to new line after each 3 values for each line", but how?? SmilieSmilieSmilieSmilie
 

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IPTABLES-SAVE(8)						  iptables 1.6.1						  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
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